~4th firing mode on the PMR stock board~

Ok guys. Today I was messing around and I thought "What would happen if I pull the trigger one extra time in firing mode setting? Will it loop back to semi or stay on mellinium? I found out there is, THERE IS A NXL FULL AUTO ON THE PMR STOCK BOARD. It's not listed in any manual. It's not in the stickys. This is a secret the I think proto did just to mess with people. Or maybe only mine has it. IDK. Which is why i'm posting this. Ok. Just go to setting like you usually would and instead of stoppin at 3 clicks pull trigger one extra time in the firing mode setting (BLINKING YELLOW) and it'll flash confirming the change. Press little thing down like usual, and pull 3 times fast then hold and it'll be NXL full auto. Or should. Mine does. It'll be as fast as you have the ROF set to. AGAIN THIS IS NOT IN ANY MANUAL AND NOT IN ANY STICKYS (hopefully it will be soon) but it exist. Just do it and give me feedback on this thread saying what happens.